Tape gumming apparatus



Feb. 20, 1940.

A. BENNETT IAPE GUMMING APPARATUS original Filed April 6, 19:55

INVENTOR. ARTHUR BENNETT ATTORNEYS EEO Patented Feb. 20, 1940 UNITED s'ra'nzs PATENT OFFICE TAPE GUMMIN G APPARATUS Arthur Bennett, San Francisco, Calif Original application vApril 6, 1935, Serial No. 15,005. Divided and this application November 18, 1936, Serial No. 111,41

3 Claims. (Cl. 91-43) This invention relates to gummed tape and the application of such tape to sheets of paper and the like, and the objects of the invention are to provide suitable apparatus to facilitate the ap- W plication of gummed strips to paper sheets, and

Examiner.

In the drawing Fig. 1 is a front elevation of the right-hand forward corner of the tape supporting table with a gum applying fountain in place over the Ytape. Fig. 2 is an enlargedelevation partly insection showing the construction of the nozzle of the gum applying fountain.

Fig. 3 is an end View of Fig. 2 showing the gum exuding slot in the nozzle. a

Fig. 4 is a vertical cross section ofthe table showingthe paper stack holding finger and associated parts.

Briefly described, the invention comprises apparatus to facilitate applying strips of gummed tape along margins of sheets of paper such as printed sheets, signs, posters, etc., which are later to be stuck to show windows, walls, etc., for temporary display. The type of gummed tape for which the apparatus was particularly designed to handle is that which is always tacky and may be transferred bodily from the tape on which it is coated to the margin of a printed poster or the like, the tape being strippedoif when it is desired to apply the poster to the show window, the evertacky gum left on the poster suiftcing to stick the same to .the window. Such a tape and the in gredients for the special gum used is fully described in my copending patent application filed under Serial No. 13,037 on date of March 26, 1935, though it is to be understood that the present apparatus is also useful for applying other or any kind of gummed tape or strips to the margins, or other portions of printed or unprinted sheets of paper or other material.

In further detail the drawing shows a table top I adapted to support a pile or stack of paper sheets 2 suitably aligned along one side by a bf the stack of paper sheets, which may be printvided with a handle 6, and a forwardly extending rod or finger 1 which overlies the upturned forward edgesof the paper sheets and holds them in the positionshown in Fig. 4. This finger is adjustably pivoted and clamped to the weight 5 as Q at 8 so that it may be set for any size stack of sheets desired and its outer end is curved down- [wardly and provided with a small notch as at 9 or slightly hooked extremity so that one sheet of the paper at a time may be easily and quickly 10 released from engagementwith thefinger l by the friction of an operators fingers on the forward (or bottom) sheet and whereupon said sheet will fall to bridge a gap It! in the table top and rest with its'forward margin on the forward portion or rail l of the table and alongwhich the gummed tape I l, sticky side up, has previously been laid so that the forward margin of the sheet will fall upon it. s

The tape is gum-coated on the apparatus and is pulled from a roll l9 along the inner margin of table rail I adjacent gap l0 and one of the paper sheets 2 released from finger 1 will fall upon its sticky surface, and after which the tape more small spursor an impinging edge on its 85 lower side which is forced against the tape by the weight l4. of the block swinging on its pivot 15 yet dueto the cam-like pivoting of the block it permits the tape to be freely drawn forwardly under the block. i t After dropping one sheet upon a stretch of the freshly coated tacky tape and cutting it off, a fresh length of tape is drawn along the rail right on top of the previous fallen sheet and the next sheetis dropped from the stack to this strip of tape to stick to it, and so on until several are thus superimposed and after which they are pushed bodily through the table gap In to spring below it as indicated at 2 in Fig. 4 so that they can dry more easily, and/or will be out of the way of continued operations.

An adjusting stop gage I6 is provided on the left-hand edge of the table rail l" against which to align the outer end of the tape with the edges of the sheets of paper.

For coating the tape with the liquid ever-tacky gum, a gum coating fountain I1 is provided which supplies the liquid gum to a special coating nozzle I8 through which the plain uncoated tape is drawn from a roll I9 supported on a suitable bracket attached to the side of the table so that the tape can run straight from it and along the rail I. This is shown in. Fig. 1 with details of the gurnming nozzle in Figs. 2 and 3. In this arrangement the uncoated tape I9 runs over a guide pin 2i, thence under the back stop I4, and thence under the nozzle I8 of the gum fountain, thence over the shearing block I3 and along the rail as previously described. v

In Fig. 1 the cutting ofi bladeIZ is shown as partially descended and about to cut off the coated tape. I a

The gum fountain is a can sired fluid gum compound of about the consistency of glue 'or rubber cement, and it flows by gravity into the nozzle I8 which is an elongated housing the width of the tape and provided with an under-cover 22 pivoted to it as at 23 and resiliently held upward by a light tension spring 24 so as to gently hold the tape against the relatively thick or wide edges of the nozzle as the tape slides along and thus keepopposite margins of the tape bare of gum. This cover is channel-shaped and its sides 22 extend loosely up along both sides of the nozzle as best shown in Fig. 2, and at the tape-leaving end of the nozzle the end wall is relieved a trifle as at 2-5 so as to provide a -clear-f ance above-the tape, and it is the size of this clearance which determines the thickness of the layer of adhesive gum compound deposited on the tape as it is manually pulled through and drawn, along the table rail I to receive a sheet 2 of paper of the gum, it will not flow'out objeotionably when the tape isat rest, and the upwardly extending sides of the channel 22 prevent any outflow of gum along the sides by-forming a seal of the setresilient gum, yet being a loose fit against the nozzle do not become immovably cemented against free operation as Would be the case if a close'fit were used;

below to insure a good contact of the previously I applied tape and sheet, or this may be done on the return stroke'of the hand in moving back to pull the tape again.

Any size sheets'may be handled on the table 'by suitable adjustment of its guides and stops l and it. Also tape of any desired material may be used in'the apparatus, suchas'cloth, paper, Cellophane, or any! other flexible macontaining the deterial, and the adhesive coating may be of any nature or quality desired, and the tape may be placed at any desired position on the sheets, either at one or opposite margins, and/or in any other position on the sheets by suitably adjusting the position of the sheets relative to the tape.

Having thus described my improved apparatus and the manner of its use, what I claim is:

1. An apparatus for gummlng tape, a container for liquid gum,- a nozzle at the lower portion of said container across which the tape is arranged to pass for depositing a band of the gum on the tape, means resiliently pressing the tapeagainst the nozzle comprising a channel plate at the outer side of the tape pivotally connected at one end to the nozzle, and a spring I at the other end 'ofthe plate urging the plate toward the nozzle, said channel plate arranged with its legs freely embracing the edges of the tape and sides of the nozzle.

In an apparatus for guinming tape, a container for liquid gum, a downwardly directed nozzle at the bottom of the container through which the gum is adapted to flow for spreading a layer ofgurn on a tape drawn across the end of the nozzle and in contact therewith, said nozzle being of elongated rectangular form with relatively wide marginalgedges against which the.

tape bears so as to preserve bare ungummed margins on the tape, a channel plate bearing against the under side of the tape with its legs extending upwardly along opposite sides of the,

nozzle, means pivoting one end of the channel plate to the nozzle adjacent to the point of entry of. the tape, and a spring resiliently urging the opposite end of the plate toward the nozzle so as to yield and adapt the device to varying thickness of tape or inequalities therein.

3. In an apparatus for gumming tape, a container for liquid gum, a downwardly directed nozzle at the bottom of the containerthrough which the gum is adapted to flow for spreading a layer of gum on a tap'e drawn across the end of the nozzle and in contact therewith, said nozzle being of elongated rectangular form with ties therein, said nozzle further characterized by having its end wall cut away where the tape leavesthe nozzlein passingthereover so as to provide a clearance above the tape at this point for determining the thickness of the band of gum spread on the tape. i

ARTHUR BENNETT, 

